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Separating complexity classes related to bounded alternating ω-branching programs

Identifieur interne : 001259 ( Istex/Corpus ); précédent : 001258; suivant : 001260

Separating complexity classes related to bounded alternating ω-branching programs

Auteurs : C. Meinel ; S. Waack

Source :

RBID : ISTEX:7C5613666DF015686B55A8B2DCA0975379BC09BE

Abstract

Abstract: We develop a theory of communication within branching programs that provides exponential lower bounds on the size of branching programs that are bounded alternating. Our theory is based on the algebraic concept of Ω-branching programs, ω: ℕ → ℝ, a semiring homomorphism, that generalizes ordinary branching programs, Ω-branching programs [M2] andMOD p-branching programs [DKMW]. Due to certain exponential lower and polynomial upper bounds on the size of bounded alternating ω-branching programs we are able to separate the corresponding complexity classesNℒ ba ,co-Nℒ ba ⊕ℒ ba , andMOD p -ℒ ba ,p prime, from each other, and from that classes corresponding to oblivious linear length-bounded branching programs investigated in the past.

Url:
DOI: 10.1007/BF01294594

Links to Exploration step

ISTEX:7C5613666DF015686B55A8B2DCA0975379BC09BE

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prime, from each other, and from that classes corresponding to oblivious linear length-bounded branching programs investigated in the past.</Para>
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<title>Separating complexity classes related to bounded alternating ω-branching programs</title>
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<title>Separating complexity classes related to bounded alternating ω-branching programs</title>
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<namePart type="family">Meinel</namePart>
<affiliation>FB IV-Informatik, Universität Trier, D-54286, Trier, Germany</affiliation>
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<name type="personal">
<namePart type="given">S.</namePart>
<namePart type="family">Waack</namePart>
<affiliation>Institut für Numerisch und Angewandte Mathematik, Georg-August-Universität Göttingen, D-37083, Göttingen, Germany</affiliation>
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<abstract lang="en">Abstract: We develop a theory of communication within branching programs that provides exponential lower bounds on the size of branching programs that are bounded alternating. Our theory is based on the algebraic concept of Ω-branching programs, ω: ℕ → ℝ, a semiring homomorphism, that generalizes ordinary branching programs, Ω-branching programs [M2] andMOD p-branching programs [DKMW]. Due to certain exponential lower and polynomial upper bounds on the size of bounded alternating ω-branching programs we are able to separate the corresponding complexity classesNℒ ba ,co-Nℒ ba ⊕ℒ ba , andMOD p -ℒ ba ,p prime, from each other, and from that classes corresponding to oblivious linear length-bounded branching programs investigated in the past.</abstract>
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<title>Mathematical systems theory</title>
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<dateIssued encoding="w3cdtf">1995-01-01</dateIssued>
<copyrightDate encoding="w3cdtf">1995</copyrightDate>
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<topic>Theory of Computation</topic>
<topic>Computational Mathematics and Numerical Analysis</topic>
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<identifier type="ISSN">0025-5661</identifier>
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<number>28</number>
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